+1 for PipePipe. I switched from Tubular a few days ago, and it imported my Tubular export flawlessly.

You don’t necessarily need to use Obtanium though, the version on F-Droid has a built-in updater. But unfortunately the built-in updater isn’t automatic (just a pop up notification that takes you to the .apk download page), so I can see the convenience of Obtainium.